The mission of the movement is the application of the scientific method for social change,” Mr. Joseph announced by way of introduction. The evening, which began at 7 with a two-hour critique of monetary economics, became by midnight a utopian presentation of a money-free and computer-driven vision of the future, a wholesale reimagination of civilization, as if Karl Marx and Carl Sagan had hired John Lennon from his “Imagine” days to do no less than redesign the underlying structures of planetary life.